CN105319162A - Detecting head for trace liquid analysis and capable of eliminating stray light interference - Google Patents
Detecting head for trace liquid analysis and capable of eliminating stray light interference Download PDFInfo
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- CN105319162A CN105319162A CN201410363697.9A CN201410363697A CN105319162A CN 105319162 A CN105319162 A CN 105319162A CN 201410363697 A CN201410363697 A CN 201410363697A CN 105319162 A CN105319162 A CN 105319162A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
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Abstract
The invention discloses a detecting head for trace liquid analysis and capable of eliminating stray light interference. In the precondition of preventing a to-be-detected trace liquid, located on a circular transparent area of a supporting disc, from falling off by arranging the supporting disc at a certain inclination angle, stray light reflected by the supporting disc is deflected from a light ray receiving area of a receiving fiber, wherein all the light ray received by the receiving fiber is light ray passing through the to-be-detected trace liquid and reflected by a reflective sheet, thereby preventing stray light reflected by the supporting disc from entering an optical analysis system through the receiving fiber. Interference due to stray light in optical analysis of the trace liquid medium is eliminated, and the accuracy of optical analysis of the trace liquid medium by a relevant optical analysis system is greatly improved.
Description
Technical field
The present invention relates to the field of optical analysis to micro liquid, particularly relate to a kind of analyzing trace liquid detection head eliminating interference of stray light.
Background technology
At present, develop by means of light a small amount of liquid medium, a such as drop of liquid medium carries out the equipment of optical analysis or absorption process mensuration, the principle of work of this kind equipment is, liquid medium to be detected is positioned on the carrier of detection head, medium is conducted through by detection head light, and going out detection head by reception fiber optic conduction after being reflected by reverberator, detection head is connected with certain optic analytical instrument treats detection or the analysis that tracer liquid medium carries out luminosity, spectrophotometric, fluorescence or spectrum fluorescence.
But, due to when incident light at angle scioptics carrier time, affect by carrier thickness and surface reflection, certain parasitic light can be produced and project the region of acceptance receiving optical fiber, and enter in analytical instrument by receiving optical fiber, the data analysis of tracer liquid medium is treated in interference, thus impact analysis precision.
Summary of the invention
The object of the invention is to for general deficiency of micro liquid being carried out to the equipment of optical analysis, a kind of analyzing trace liquid detection head eliminating interference of stray light is provided, by carrier is arranged certain angle of inclination, under making the prerequisite of the micro liquid to be detected not landing on carrier, the parasitic light that carrier reflection produces is deflected out the light receiver region of described reception optical fiber, the parasitic light avoiding carrier to produce enters optical analysis system by receiving optical fiber, thus elimination parasitic light analyzes the interference caused to micro liquid medium, improve the degree of accuracy to micro liquid medium analysis.
Technical scheme of the present invention is:
Eliminate an analyzing trace liquid detection head for interference of stray light, comprising:
Housing, it is the tubular structure of the hollow vertically arranged;
Carrier, it is covered in the top end opening of described housing and the cross-sectional direction along described housing is provided with certain angle of inclination, forming the table top of an inclination closed by housing tip, described carrier being provided with the transparent region for placing micro liquid to be detected;
Beam condensing unit, it is a light penetrating object that light can be carried out assembling, and described beam condensing unit is to be movably connected on the inside of described housing with carrier apart from adjustable mode and enclosure interior to be divided into two separate space;
Reflector plate, it is arranged at the top of described carrier.
Preferably, in the analyzing trace liquid detection head of the described interference of stray light eliminated, the part coating hydrophobic layer on described carrier outside transparent region makes micro liquid to be detected be limited in circular transparent region and forms semisphere drop;
In addition, the transparent region of described carrier is set to the circle that diameter is 1.2-2mm, and the thickness of described carrier transparent region is 0.5-2mm.
Preferably, in the analyzing trace liquid detection head of the described interference of stray light eliminated, the center in circular non-opaque region of described carrier and the center superposition of carrier are also arranged on same vertical axis with the center of beam condensing unit.
Preferably, in the analyzing trace liquid detection head of the described interference of stray light eliminated, described reflector plate is fixedly connected with a Height Adjustable support and the height of the semisphere drop that the distance between reflector plate and carrier and micro liquid to be detected are formed is corresponding.
Preferably, in the analyzing trace liquid detection head of the described interference of stray light eliminated, the distance between described beam condensing unit and carrier is as the criterion by passing from the center of the clear area of the circle of described carrier after beam condensing unit and focus at reflector plate after passing micro liquid to be detected with incident ray.
Preferably, in the analyzing trace liquid detection head of the described interference of stray light eliminated, the bottom of described housing is provided with the sealing-plug for matching by described housing bottom end closure and with housing inner diameter, and described sealing-plug is embedded in housing by the mode adjustable with position and is flexibly connected with described housing.
Preferably, in the analyzing trace liquid detection head of the described interference of stray light eliminated, the movable connection method of described beam condensing unit and described housing is: the sidewall of described sealing-plug to extend internally out coupling arrangement along the inwall of described housing, described beam condensing unit be fixedly connected with described coupling arrangement and and described sealing-plug link and make the distance between beam condensing unit and described carrier adjustable.
Preferably, in the analyzing trace liquid detection head of the described interference of stray light eliminated, described sealing-plug is respectively arranged with the incident optical and reception optical fiber that run through sealing-plug, wherein said incident optical and receive optical fiber and be arranged in symmetrical position, the both sides, axis of described sealing-plug, the first end that described reception optical fiber passes sealing-plug is set to light receiver region;
The analyzing trace liquid of the described interference of stray light eliminated is connected to reception optical fiber and corresponding device for the optical evaluation by incident optical with detection head.
Preferably, in the analyzing trace liquid detection head of the described interference of stray light eliminated, described carrier goes out the light receiver region of described reception optical fiber along the angle of inclination in described housing cross-sectional direction to make the light deflection reflected by carrier and the micro liquid to be detected not landing on described transparent region is as the criterion, and described carrier is less than or equal to 20 degree along the angle of inclination in described housing cross-sectional direction.
Preferably, in the analyzing trace liquid detection head of the described interference of stray light eliminated, when described carrier thickness is 0.9-1.1mm, when incident optical and the distance received between optical fiber are 0.3-0.5mm, the optimum tilt angle of carrier is 2-3 degree.
The present invention has following beneficial effect: a kind of analyzing trace liquid detection head eliminating interference of stray light of the present invention, by carrier is arranged certain angle of inclination, under making the prerequisite of the micro liquid to be detected not landing on carrier circular non-opaque region, the parasitic light that carrier reflection produces is deflected out the light receiver region of described reception optical fiber, the light that reception optical fiber is received all for after micro liquid to be detected by reflector plate reflect after light, the parasitic light of carrier is avoided to enter optical analysis system by receiving optical fiber, thus the parasitic light eliminating carrier analyzes the interference caused to micro liquid medium, increase substantially the degree of accuracy to micro liquid medium analysis, relative to general detection head micro liquid being carried out to optical analysis, degree of accuracy of the present invention improves more than 5%.
Accompanying drawing explanation
Fig. 1 is that the analyzing trace liquid detection head eliminating interference of stray light of the present invention analyses structural representation;
Fig. 2 is the light path schematic diagram eliminating the analyzing trace liquid detection head of interference of stray light of the present invention;
Fig. 3 is existing light path schematic diagram micro liquid being carried out to the detection head device of light analysis.
Embodiment
Below in conjunction with accompanying drawing 1-3, the present invention is elaborated, can implement according to this after consulting this instructions to make those of ordinary skill in the art.
As shown in Figure 1, a kind of analyzing trace liquid detection head eliminating interference of stray light, comprising: housing 1, and it is the tubular structure of the hollow vertically arranged, and bottom is furnished with incident optical 4 respectively and receives optical fiber 5; Carrier 3, it is covered in the top end opening of described housing 1 and the cross-sectional direction along described housing 1 is provided with certain angle of inclination, form one by the table top of the inclination of housing 1 top closure, described carrier 3 is provided with the transparent region for placing micro liquid to be detected, carrier 3 can use suprasil sheet, and micro liquid 6 to be detected is positioned on the transparent region of carrier 3; Beam condensing unit 2, it is a light penetrating object that light can be carried out assembling, the convex lens of such as quartzy material or crystal material or spheroid, described beam condensing unit 2 is being movably connected on the inside of described housing 1 with carrier 3 apart from adjustable mode and be two separate space by housing 1 interior separation; Reflector plate 7, the top that described reflector plate 7 is arranged at the carrier 3 of described light path system also and between described carrier 3 is provided with certain distance, and described reflector plate 3 be arranged in parallel with the xsect of described housing 1.
The exhumation process of light as shown in Figure 2 or Figure 3, when incident ray passes through beam condensing unit 2 at an angle by incident optical 4, focus with the distance of carrier 3 by regulating beam condensing unit 2, incident ray is made to focus on reflector plate 7 through the transparent region of carrier 3 through after micro liquid 6 to be detected, the reflection ray that produced by reflector plate 7 is radiated at through the transparent region of carrier 3 and beam condensing unit 2 the light receiver region 9 receiving optical fiber 5 in the other direction, complete the light path process of turning back of light, incident optical 4 is connected with corresponding optical detection apparatus by a monochromator with reception optical fiber 5, light signal transduction is entered pick-up unit thus micro liquid 6 medium is analyzed accurately.But in general device, carrier 3 is for being horizontally disposed with, as shown in Figure 3, when incident ray passes through the transparent region of carrier 3, the surface often having certain thickness and a transparent region due to the transparent region of carrier 3 has certain reflection function, can produce certain not by reflection ray both parasitic lights 10 of micro liquid 6 to be detected, this type of parasitic light 10 directly reflects by carrier 3 the light region of acceptance 9 arriving reception optical fiber 5 without micro liquid 6 to be detected and enters analytic system, the degree of accuracy that impact analysis is measured.The present invention is by arranging certain angle of inclination by carrier 3, as shown in Figure 2, this angle needs to keep original position and not landing at guarantee micro liquid 6 to be detected at transparent region, and do not affect light normal through under the prerequisite of transparent region, the parasitic light 10 of generation is made to deflect out the light receiver region 9 of reception optical fiber 5, thus avoid parasitic light 10 to enter analytic system, eliminate the interference that the analysis to measure of parasitic light 10 to micro liquid 6 to be detected causes, ensure that the accuracy of analysis to measure.
In the analyzing trace liquid detection head of the described interference of stray light eliminated, the transparent region of described carrier 3 is set to the circle that diameter is 1.2-2mm, be set to the circular non-opaque region that diameter is 1.6mm in the present invention, the part coating hydrophobic substance outside circular non-opaque region forms hydrophobic layer makes micro liquid 6 to be detected be limited in circular transparent region formation semisphere drop.In addition, carrier 3 is suprasil sheet, and the part outside circular non-opaque region is coated with lighttight film, and make carrier 3 be circular non-opaque region for central authorities, periphery is the ring-type of lightproof part.The thickness of described carrier 3 and carrier 3 transparent region is 0.5-2mm.
In addition, the angle of inclination of carrier 3 and the thickness of carrier 3, incident optical 4 and the distance received between optical fiber 5 have direct relation, pass through lot of experiment validation, in the present invention, carrier 3 thickness is 0.9-1.1mm, the best is 1.0mm, and incident optical 4 and the distance received between optical fiber 5 are 0.3-0.5mm, when the best is 0.4mm, the optimum tilt angle of carrier 3 is 2-3 degree, and this angle is generally no more than 20 degree.By carrying out emulation optical path analysis and prototype test and verification, carrier 3 reflects the parasitic light 10 of generation under incident light energy reaches 100% situation, namely the setting energy value of designing requirement is 100%, reflect stray light 10 energy value is then less than 0.2%, the present invention can eliminate the interference of at least 99.8% parasitic light 10, can increase substantially the degree of accuracy of measurement.
In the analyzing trace liquid detection head of the described interference of stray light eliminated, the center in the circular non-opaque region of described carrier 3 and the center superposition of carrier 3 are also arranged on same vertical axis with the center of beam condensing unit 2.
In the analyzing trace liquid detection head of the described interference of stray light eliminated, described reflector plate 7 is fixedly connected with a Height Adjustable support and the height of the semisphere drop that the distance between reflector plate 7 and carrier 2 and micro liquid to be detected 6 are formed is corresponding.Described reflector plate 7 is one can the smooth planar optics of reflection ray, it to be arranged on bottom certain reflection unit and corresponding with the circular non-opaque region of carrier 3, reflecting surface is just to circular non-opaque region, by regulating height and the position of support, reflector plate 7 is made just to arrive the top of the semisphere drop that micro liquid 6 to be detected is formed, and do not destroy the structure of semisphere drop, the light by semisphere drop is reflected.
In the analyzing trace liquid detection head of the described interference of stray light eliminated, in use, as required by regulating the distance between beam condensing unit 2 and carrier 3 to carry out focus adjustment, the distance between described beam condensing unit 2 and carrier 3 is as the criterion by passing from the center of the clear area of the circle of described carrier 3 after beam condensing unit 2 and focus at reflector plate 7 after passing micro liquid 6 to be detected with incident ray.
In the analyzing trace liquid detection head of the described interference of stray light eliminated, the bottom of described housing 1 is provided with the sealing-plug 8 for matching by described housing 1 bottom end closure and with housing 1 internal diameter, and described sealing-plug 8 embeds in housing 1 in the mode that position is adjustable and is flexibly connected with described housing 1.
In the analyzing trace liquid detection head of the described interference of stray light eliminated, beam condensing unit 2 realizes its being flexibly connected with housing 1 by being fixedly connected with sealing-plug 8, by the position regulating the position of sealing-plug 8 can regulate beam condensing unit 2 very easily.Described beam condensing unit 2 with the movable connection method of described housing 1 is: the sidewall of described sealing-plug 8 to extend internally out coupling arrangement along the inwall of described housing 1, described beam condensing unit 2 be fixedly connected with described coupling arrangement and and described sealing-plug 8 link and make the distance between beam condensing unit 2 and described carrier 3 adjustable.Described coupling arrangement can be several connecting links that the sidewall of sealing-plug 8 extends, and also can be hollow tube, and beam condensing unit 2 is fixed by bonding mode and connecting link or hollow tube, thus servo-actuated with sealing-plug 8.
In the analyzing trace liquid detection head of the described interference of stray light eliminated, described sealing-plug 8 is respectively arranged with the incident optical 4 and reception optical fiber 5 that run through sealing-plug 8, wherein said incident optical 4 and receive optical fiber 5 and be arranged in symmetrical position, the both sides, axis of described sealing-plug 8, the first end that described reception optical fiber 5 passes sealing-plug 8 is set to light receiver region 9.Light is injected by incident ray 4, arrives the light receiver region 9 receiving optical fiber 5, thus complete light path process in the present invention after completing reflection.The analyzing trace liquid that the described parasitic light eliminated 10 disturbs detection head is connected, as visible ray, spectrophotometric, fluorescence or spectrum fluoroscopic examination or analytical equipment to reception optical fiber 5 and corresponding device for the optical evaluation by incident optical 4.
In the analyzing trace liquid detection head of the described interference of stray light eliminated, described carrier 3 goes out the light receiver region 9 of described reception optical fiber 5 relative to the angle of inclination of housing 1 xsect to make the light deflection reflected by carrier 3 and the micro liquid to be detected 6 not landing on described transparent region is as the criterion.
Although embodiment of the present invention are open as above, but it is not restricted to listed in instructions and embodiment utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend described.
Claims (10)
1. can eliminate an analyzing trace liquid detection head for interference of stray light, it is characterized in that, comprising:
Housing, it is the tubular structure of the hollow vertically arranged;
Carrier, it is covered in the top end opening of described housing and the cross-sectional direction along described housing is provided with certain angle of inclination, forming the table top of an inclination closed by housing tip, described carrier being provided with the transparent region for placing micro liquid to be detected;
Beam condensing unit, it is a light penetrating object that light can be carried out assembling, and described beam condensing unit is to be movably connected on the inside of described housing with carrier apart from adjustable mode and enclosure interior to be divided into two separate space;
Reflector plate, it is arranged at the top of described carrier.
2. can eliminate the analyzing trace liquid detection head of interference of stray light as claimed in claim 1, it is characterized in that, the part coating hydrophobic layer on described carrier outside transparent region makes micro liquid to be detected be limited in circular transparent region and forms semisphere drop;
In addition, the transparent region of described carrier is set to the circle that diameter is 1.2-2mm, and the thickness of described carrier transparent region is 0.5-2mm.
3. can eliminate the analyzing trace liquid detection head of interference of stray light as claimed in claim 2, it is characterized in that, the center in circular non-opaque region of described carrier and the center superposition of carrier are also arranged on same vertical axis with the center of beam condensing unit.
4. can eliminate the analyzing trace liquid detection head of interference of stray light as claimed in claim 1, it is characterized in that, described reflector plate is fixedly connected with a Height Adjustable support and the height of the semisphere drop that the distance between reflector plate and carrier and micro liquid to be detected are formed is corresponding.
5. the analyzing trace liquid detection head of the interference of stray light eliminated as described in claim 3 or 4, it is characterized in that, the distance between described beam condensing unit and carrier is as the criterion by passing from the center of the clear area of the circle of described carrier after beam condensing unit and focus at reflector plate after passing micro liquid to be detected with incident ray.
6. can eliminate the analyzing trace liquid detection head of interference of stray light as claimed in claim 1, it is characterized in that, the bottom of described housing is provided with the sealing-plug for matching by described housing bottom end closure and with housing inner diameter, and described sealing-plug is embedded in housing by the mode adjustable with position and is flexibly connected with described housing.
7. can eliminate the analyzing trace liquid detection head of interference of stray light as claimed in claim 6, it is characterized in that, the movable connection method of described beam condensing unit and described housing is: the sidewall of described sealing-plug to extend internally out coupling arrangement along the inwall of described housing, described beam condensing unit be fixedly connected with described coupling arrangement and and described sealing-plug link and make the distance between beam condensing unit and described carrier adjustable.
8. can eliminate the analyzing trace liquid detection head of interference of stray light as claimed in claim 7, it is characterized in that, described sealing-plug is respectively arranged with the incident optical and reception optical fiber that run through sealing-plug, wherein said incident optical and receive optical fiber and be arranged in symmetrical position, the both sides, axis of described sealing-plug, the first end that described reception optical fiber passes sealing-plug is set to light receiver region;
The analyzing trace liquid of the described interference of stray light eliminated is connected to reception optical fiber and corresponding device for the optical evaluation by incident optical with detection head.
9. the analyzing trace liquid detection head of the interference of stray light eliminated as described in claim 2 or 8, it is characterized in that, described carrier goes out the light receiver region of described reception optical fiber along the angle of inclination in described housing cross-sectional direction to make the light deflection reflected by carrier and the micro liquid to be detected not landing on described transparent region is as the criterion, and described carrier is less than or equal to 20 degree along the angle of inclination in described housing cross-sectional direction.
10. the analyzing trace liquid detection head of the interference of stray light eliminated as described in claim 2 or 8, it is characterized in that, when described carrier thickness is 0.9-1.1mm, when incident optical and the distance received between optical fiber are 0.3-0.5mm, the optimum tilt angle of carrier is 2-3 degree.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410363697.9A CN105319162B (en) | 2014-07-28 | 2014-07-28 | A kind of analyzing trace liquid detector for eliminating interference of stray light |
| PCT/CN2015/070585 WO2016015457A1 (en) | 2014-07-28 | 2015-04-02 | Trace liquid analysis detection head capable of eliminating stray light interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410363697.9A CN105319162B (en) | 2014-07-28 | 2014-07-28 | A kind of analyzing trace liquid detector for eliminating interference of stray light |
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| Publication Number | Publication Date |
|---|---|
| CN105319162A true CN105319162A (en) | 2016-02-10 |
| CN105319162B CN105319162B (en) | 2018-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410363697.9A Active CN105319162B (en) | 2014-07-28 | 2014-07-28 | A kind of analyzing trace liquid detector for eliminating interference of stray light |
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| CN (1) | CN105319162B (en) |
| WO (1) | WO2016015457A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858669A (en) * | 2021-04-23 | 2021-05-28 | 北京华益精点生物技术有限公司 | Laser detection device |
| CN117976251A (en) * | 2024-04-02 | 2024-05-03 | 陕西星环聚能科技有限公司 | Detection light transmission assembly, system and nuclear fusion reaction system for plasma |
| CN117976251B (en) * | 2024-04-02 | 2024-06-25 | 陕西星环聚能科技有限公司 | Detection light transmission assembly, system and nuclear fusion reaction system for plasma |
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| CN117976251B (en) * | 2024-04-02 | 2024-06-25 | 陕西星环聚能科技有限公司 | Detection light transmission assembly, system and nuclear fusion reaction system for plasma |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016015457A1 (en) | 2016-02-04 |
| CN105319162B (en) | 2018-07-24 |
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